The kinetic energy of an object is the energy which it possesses due to its motion.
In physics, potential energy is the energy stored in a body or in a system due to its position in a force field or due to its configuration.

Kinetic

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Potential
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We are going to build a marble maze that ends up with a marble hitting a toy truck with a sticker in it.
We are using the potential energy to create a large kinetic energy.

Acoustic Energy:

Definition: energy from a distinctive noise identified by the sense of hearing
Acoustic energy is used in an acoustic guitar.
We are going to have a the marble hit a bell to make noise.
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Mechanical Energy:

Definition: A form of energy related with a force of motion
People are always using mechanical energy.
We are going to push the marble to start.
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This is mechanical because the skier is in motion downhill.